describe :file_zero, shared: true do before :each do @zero_file = tmp("test.txt") @nonzero_file = tmp("test2.txt") @dir = tmp("dir") Dir.mkdir @dir touch @zero_file touch(@nonzero_file) { |f| f.puts "hello" } end after :each do rm_r @zero_file, @nonzero_file rm_r @dir end it "returns true if the file is empty" do @object.send(@method, @zero_file).should == true end it "returns false if the file is not empty" do @object.send(@method, @nonzero_file).should == false end it "accepts an object that has a #to_path method" do @object.send(@method, mock_to_path(@zero_file)).should == true end platform_is :windows do it "returns true for NUL" do @object.send(@method, 'NUL').should == true @object.send(@method, 'nul').should == true end end platform_is_not :windows do it "returns true for /dev/null" do @object.send(@method, File.realpath('/dev/null')).should == true end end it "raises an ArgumentError if not passed one argument" do lambda { File.zero? }.should raise_error(ArgumentError) end it "raises a TypeError if not passed a String type" do lambda { @object.send(@method, nil) }.should raise_error(TypeError) lambda { @object.send(@method, true) }.should raise_error(TypeError) lambda { @object.send(@method, false) }.should raise_error(TypeError) end it "returns true inside a block opening a file if it is empty" do File.open(@zero_file,'w') do @object.send(@method, @zero_file).should == true end end # See https://bugs.ruby-lang.org/issues/449 for background it "returns true or false for a directory" do @object.send(@method, @dir).should be_true_or_false end end describe :file_zero_missing, shared: true do it "returns false if the file does not exist" do @object.send(@method, 'fake_file').should == false end end